442187 has 12 divisors (see below), whose sum is σ = 506520. Its totient is φ = 383616.

The previous prime is 442181. The next prime is 442193. The reversal of 442187 is 781244.

It is an interprime number because it is at equal distance from previous prime (442181) and next prime (442193).

It is not a de Polignac number, because 442187 - 2⁴ = 442171 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11933 + ... + 11969.

It is an arithmetic number, because the mean of its divisors is an integer number (42210).

2⁴⁴²¹⁸⁷ is an apocalyptic number.

442187 is a deficient number, since it is larger than the sum of its proper divisors (64333).

442187 is a wasteful number, since it uses less digits than its factorization.

442187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110 (or 73 counting only the distinct ones).

The product of its digits is 1792, while the sum is 26.

The square root of 442187 is about 664.9714279576. The cubic root of 442187 is about 76.1848570199.

The spelling of 442187 in words is "four hundred forty-two thousand, one hundred eighty-seven".